Christian seok



2 Sheets-Sheet 1.

(No Model.)

0. SEOK.

- ROLLER MILL FOR GRINDING 001m, &c.

No. 253,113. Patented Jan. 31,1882.

(No Model.) 2 Sheets-Sheet 2.

O. SEGK.

BOLLE R MILL FOR GRINDING CORN, (Sac. No. 253,113. Patented Jan. 31,1882.

N. PETERS. Phumuhn m her. Washmglun, u, c.

Uwrren STATES Farce.

CHRISTIAN SEOK, OF DRESDEN, SAXONY, GERMANY, ASSIGNOR OF ONE-HALF TO CARL SEUK, OF. SAME PLACE. l

ROLLER-MILL FOR GRINDING CORN, 80C.

SPECIFICATION forming part of Letters PatentNo. 253,113, dated January 31, 1882,

Application filed July 9, 1881. (No model.) Patented in Germany November 26, 1880, in England April 13, 1881, in Austria-Hungary Juno 4, 1381, in Belgium June 21, 1881, and in Italy June 30, 1881.

To all whom it may concern: small roller f, and also an idler chain-wheel,

Be it known that I, CHRISTIAN SEGK, of Dresden, in the Kingdom of Saxony, German Empire, have invented a certain new and useful Improvement in Roller-Mills for Grinding Corn and other Substances, of which the following is a specification. a

The improvement relates to that class of grinding-mills in which two rollers revolvein opposite directions with great difterence in their circumferential speed.

This improvement consists in the combination, with the rollers and an endless chain for driving them, of novel devices for simultaneously slackening the chain while suddenly removing or shifting the one roller or cylinder from the other to permit any hard substance to pass between them.

In the annexed drawings, Figure 1 is a side view, and Fig. 2 is an end view, ofa roller-mill to which the above improvement is applied. Fig. 3 is a diagram showing the way in which the endless chain runs, and showing at the same time the device for slackening the chain and the method of removing or shifting the small roller or cylinder from the larger one. Fig. 4 is a section through the hopper; and Figs. 5 and 6 are detail views upon a larger scale, respectively illustrating the devices for moving one rolleraway from the other and for slacking the driving-chain simultaneously therewith.

Similar letters of reference designate corresponding parts in all the figures.

The two working rollers or cylinders d and f are supposed to be of diameters in proportion of five to two. The large roller d receives rotary motion by a pulley fixed on its axle. This motion is transmitted by chain d lying or running over the chain-wheel s on the axle of d to chain-wheel s, which is fixed to the axle of the small roller f. The diameters of the two chaiirwheelsss are such that a circumferential velocity of cl and f is established in the proportion of seven and one-half to one. The two rollers or cylinders rotate in opposite directions, as indicated by arrows in Fig. 3, and in order to impart the proper motion the chain (1 receives within it the chain-wheel s on the 8 but passes on and engages with one side only of the wheels on the roller (1. Tnis chainwheel or idler .9 turns on an axle carried by a movable lever, as will be specified hereinafter with reference to the purpose of such construction.

In order to remove or to shift the small roller from time to time from the large. roller, it is necessary that the chain should allow such movement, and for slackening the chain when the small roller is moved away from the large roller the following arrangement is provided, which is best shown in Fig. 6:

The axle n is provided with a handle, a, and

when it is desired to move the small rollerf out of engagement with the large roller d the shaft is turned slightly by said handle. The turning of the shaft or slackens the chain d to permit the shifting of the, rollerf, and simul taneously shifts said roller, as lwill now describe. The axle a is provided with a crank, 00. The rod y, connected to this crank, passes through the lever e, which has its pivot at z, and which carries the chain-wheel .9 The rod 1 is so connected to the lever 2 that if axle n is turned the partial rotation of crank :20 will lift the lever z and the wheel 8 so that the chain becomes slackened. The upper end of the rod 3 which passes beyond lever z, is surrounded by a spiral spring, 8 the upper end So of which rests against a nut and a counter-nut on the thread applied to the uppermost end of the rod y, and which spring, with its lower end, rests on the lever z.

The shifting of the rollerf is caused by the scribed above that if axle a is turned the two 5 motions will be produced simultaneously, viz: slackening of the cham by the parts: crank or eccentric 4r, rod y, and lever z, which carries This lever 0 the chain-wheel s and shifting of the small roller by the parts: crank-pin 7v, plumber-block a, rod u, and lever t.

In order to regulate the exact position of small rollerf with reference to large ioller d, the hand-wheel l is nse'l, which forms the female screw-nut to the screw-thread on the rod u. i is a jam-nut for securing the exact position. A second screw, in, provided with two nuts, maybe used fol-"the same purpose, as seen in Fig. 1.

teferring now more particularly to Fig. 5, through rod ua wedge, a, is driven, upon which the plate it? rests. The two rods of it, connected to the block v, extend in upward direction, and are connected together at the upper end by plate a", which is loose on the rod a. Between plate '11 and plate a a spiral spring is arranged, surrounding rod 76. By this arrangement of parts the attendant is enabled to regulate the exact position of rollerf, and at the same. time to shift the rollerf, if this becomes necessary, for the passage of a hard bodyor bodies between the two griinling-rollers.

It will be understood from the foregoing that the cranknn to, acting through the rods a, the plates a It, and the spiral spring surrounding the rod 7L, holds the roller 1'' against the roller (1 with a yielding pressure, while when the block 1: strikes the lower end of the rod a the roller-f is moved positively away from the roller (1. In the same way the crank exerts its force on the leverzthrough the spiral spring and therefore holds the said lever and the idler-wheel .5 which it carries, down with a yielding pressure.

On the axle of the small roller or cylinder 1" a chain-wheel, s, is situated, which communicates rotary motion by means of a small endlesschain,s ,tothefeeding-rollerr. Thisroller carries at one end a crank, a", the pin of which works in the slot of the lever W. This lever is fixed to the outer end of an axle, i, situated horizontally in the hopper. This axle is pro- "ided with one or more fingers, T, which by the describedarrangements of parts receive a swinging or reciprocating motion, by which any obstruction of the material in the hopper and stoppage of the feed of material to the rollers are prevented.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

In a roller-mill, the combination of two rollers, a chain for transmitting motion from one to the other, pivoted levers comprising bearings for one of said rollers, a chain-wheel or idler, around which said chain is passed, and a lever comprising bearings therefor, and a shaft and connections whereby said levers may be simultaneously raised to remove one roller from the other and for slackening said chain, substantially as specified.

In testimony whereofI have hereunto set my hand, this th day of May, 1881, in the presence of two subscribing witnesss.

CHRISTIAN SEOK.

\Vitnesses:

WILIIELM \VmsnNnU'rtrEa, MARTIN Ki'nmnn. 

